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Why was my Manitoba Health claim rejected?

In Manitoba, the reason a claim was rejected is the Explanation of Benefits (EOB) code beside it on your Remittance Advice from Manitoba Health (Manitoba Physician's Manual, page CLMST-4). If the claim had a wrong detail, correct it and resubmit it electronically within six months of the date of service instead of querying it (page CLMST-1). If the claim was right and you disagree with the assessment or payment, query it within six months of the Remittance Advice date (pages CLMST-1 and CLMST-7). Code C2 means the claim arrived more than six months after the service date; code 77 means it is still pending and should not be resubmitted or queried (pages CLMST-3 and CLMST-5).

Last checked: Checked against the Manitoba Physician's Manual (April 1, 2026 edition, with the October 1, 2026 update) by Unbilled on . Not yet reviewed by a medical biller.

What to do and by when

What to do with a rejected or pending Manitoba Health claim, and the time limit for each, from the Manitoba Physician's Manual. No tariff or fee applies.
What the Remittance Advice showsWhat to doTime limitManual pageManual dated
Rejected, and the claim had a wrong detailCorrect it and resubmit it electronically. Do not query it.6 months from the date of serviceCLMST-1 (item 9)
Assessed or paid in a way you disagree with, and the claim was rightQuery it6 months from the Remittance Advice dateCLMST-1 (item 8); CLMST-7
Code 77, under "Listing of Pending Claims"Wait. Do not resubmit or query it.Information requested: send it within 6 months of the request. Still not assessed 6 months after Manitoba Health has everything: discuss it with Doctors Manitoba.CLMST-5; CLMST-1 (items 4, 6, 7)
Code C2The claim arrived too late. You may ask in writing for an extension, only for extenuating circumstances.Already passed: 6 months from the date of serviceCLMST-3

When it applies / when it does not

Where the reason is

  • The Remittance Advice is the statement Manitoba Health provides each pay period, at mid-month and month end. (CLMST-4)
  • It has two parts: processed claims and pending claims. (CLMST-4)
  • The EOB code is the short reason code beside each claim. In the manual's words, EOB codes "explain any changes in payment made by Manitoba Health." (CLMST-4)
  • The manual makes reviewing the EOB codes the physician's responsibility. (CLMST-4)
  • Manitoba Health publishes its full list of EOB codes. The link is under Source.

Correct and resubmit: the claim had a wrong detail

  • "Claims that require a correction to the initial claim must be electronically submitted with the necessary corrections noted in the EOB within six months from the date of the service." (CLMST-1)
  • "A query should not be submitted for claims that require a correction." (CLMST-1)
  • The six months run from the date of service, not from the date of the Remittance Advice. (CLMST-1)

Query: the claim was right and you disagree

  • "if a physician disagrees with an assessment and/or payment of a claim, they may query the claim within six months of the date on the Remittance Advice." (CLMST-1)
  • A phone call first may settle it. A medical assessor is the person at Manitoba Health who assesses the claim. "An initial contact with the medical assessor may resolve the assessment to the physician’s satisfaction." (CLMST-7)
  • Manitoba Health answers a query within 90 days of receiving it. (CLMST-1; CLMST-7)
  • Send each query once. "Duplicate queries and multiple submissions of the same query will not be reviewed." (CLMST-1)
  • If Manitoba Health does not answer within 90 days, discuss the claim with Doctors Manitoba. Do the same if the answer does not satisfy you. (CLMST-1; CLMST-7)

Code 77 and code C2

  • Code 77 marks a pending claim. "Please do not resubmit or query claims listed as pending." It shows as processed on a later Remittance Advice. (CLMST-5)
  • A pending claim still has limits. Manitoba Health may ask for more information; send it within six months of the request. If the claim is not assessed within six months of Manitoba Health having all the information, the manual says to discuss it with Doctors Manitoba. (CLMST-1)
  • "Claims received by Manitoba Health more than 6 months after the service date will be rejected with Explanation of Benefits (EOB) code “C2”." (CLMST-3)
  • An extension of the six months must be asked for in writing, with details of the extenuating circumstances. (CLMST-3)
  • Questions about a Remittance Advice go to Claims Enquiry at Manitoba Health, at 204-786-7355. (CLMST-5)

Worked example

Sample visit. Not a real patient.

Your mid-July 2026 Remittance Advice from Manitoba Health shows three claims to look at. Each is tariff 8529, a regional intermediate visit. It pays $41.02 (page A-119).

  1. A visit on June 3, 2026 sits under "Listing of Pending Claims" with code 77. You do nothing unless Manitoba Health asks you for more information. If it does, you send it within six months of the request. The claim will appear as processed on a later Remittance Advice.
  2. A visit on May 12, 2026 was rejected. The patient's surname on the claim was misspelled. The claim was wrong, so your clinic corrects the name and resubmits it electronically. The six months count from May 12, the date of service. You do not query it. If Manitoba Health asks for supporting documents, you send them within six months of the request.
  3. A visit on April 20, 2026 was rejected. The claim details match the chart, and the note supports the visit. You disagree with the assessment, so you call the medical assessor first. If that does not settle it, you query the claim within six months of the mid-July Remittance Advice date. Manitoba Health answers within 90 days.

One Remittance Advice, three routes. Two things decide each one: whether it is pending, and whether the claim was wrong.

What is often not billed

A rejected claim that is never corrected and resubmitted. A claim rejected for a wrong detail is still care you provided. The wrong detail may be the patient's name or the date of service. It can be paid only if the corrected claim reaches Manitoba Health within six months of the date of service, unless an extension is granted (CLMST-1; CLMST-3). After that, it comes back with code C2 (CLMST-3). The manual lists billing errors among the claims that need supporting documents to be processed (CLMST-2). These include a wrong date of service, tariff or patient. Keep the note for the visit at hand.

Source

Manitoba Physician's Manual, April 1, 2026 edition (with the October 1, 2026 update), Claims Submission and Payment Procedures, pages CLMST-1, CLMST-2, CLMST-3, CLMST-4, CLMST-5 and CLMST-7, and page A-119 (tariff 8529). Manitoba Health publishes the manual at gov.mb.ca/health/manual.

Manitoba Health's full list of EOB codes: gov.mb.ca/health/claims/docs/eob.pdf

Last checked: Checked against the Manitoba Physician's Manual (April 1, 2026 edition, with the October 1, 2026 update) by Unbilled on . Not yet reviewed by a medical biller.

Unbilled is not Manitoba Health or Doctors Manitoba. This page is general information, not a ruling on any claim. Manitoba Health decides what is payable. Check the current manual before you bill.

To report an error on this page, email hello@unbilled.ca.

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